/* 全局样式 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --gray-color: #95a5a6;
    --white-color: #fff;
    --black-color: #333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--black-color);
    background-color: #f5f5f5;
}

a {
    text-decoration: none;
    color: var(--primary-color);
}

a:hover {
    color: var(--secondary-color);
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: var(--white-color);
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn:hover {
    background: var(--secondary-color);
    color: var(--white-color);
}

/* 头部样式 */
.header {
    background: var(--dark-color);
    color: var(--white-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav ul li {
    margin-left: 20px;
}

.main-nav ul li a {
    color: var(--white-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.main-nav ul li a:hover {
    color: var(--primary-color);
}

.main-nav ul li a.active {
    color: var(--primary-color);
    font-weight: bold;
}

/* 主要内容布局 */
.main-content {
    display: flex;
    margin: 30px auto;
    gap: 30px;
}

.content {
    flex: 2;
}

.sidebar {
    flex: 1;
}

/* 文章列表样式 */
.blog-posts {
    margin-bottom: 30px;
}

.blog-posts h2 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #ddd;
}

.post {
    background: var(--white-color);
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.post h3 {
    margin-bottom: 10px;
}

.post h3 a {
    color: var(--dark-color);
}

.post h3 a:hover {
    color: var(--primary-color);
}

.post-meta {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 15px;
}

.post-meta .date {
    margin-right: 15px;
}

.post p {
    margin-bottom: 15px;
}

.read-more {
    display: inline-block;
    font-weight: bold;
    transition: all 0.3s ease;
}

.read-more:hover {
    color: var(--secondary-color);
}

/* 侧边栏样式 */
.widget {
    background: var(--white-color);
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.widget h3 {
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #ddd;
}

.profile-img {
    display: block;
    margin: 0 auto 15px;
    border-radius: 50%;
}

.categories {
    list-style: none;
}

.categories li {
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px dashed #eee;
}

.categories li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.subscribe-form input {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

/* 页脚样式 */
.footer {
    background: var(--dark-color);
    color: var(--white-color);
    padding: 30px 0;
    text-align: center;
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.social-links {
    margin-top: 15px;
}

.social-links a {
    color: var(--white-color);
    margin: 0 10px;
    font-size: 20px;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color);
}

/* 回到顶部按钮 */
#back-to-top {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary-color);
    color: var(--white-color);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 20px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    z-index: 99;
}

#back-to-top:hover {
    background: var(--secondary-color);
}

/* 文章页样式 */
.article-container {
    margin: 30px auto;
}

.article-content {
    background: var(--white-color);
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.article-content h1 {
    margin-bottom: 15px;
    font-size: 32px;
}

.article-meta {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 20px;
}

.article-meta span {
    margin-right: 15px;
}

.featured-image {
    display: block;
    margin: 0 auto 20px;
    max-height: 400px;
    object-fit: cover;
    border-radius: 5px;
}

.article-body h2 {
    margin: 25px 0 15px;
    font-size: 24px;
}

.article-body p {
    margin-bottom: 15px;
}

.article-body pre {
    background: #f5f5f5;
    padding: 15px;
    border-radius: 5px;
    margin: 15px 0;
    overflow-x: auto;
}

.article-body code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
}

.article-footer {
    margin-top: 30px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

.tags a {
    display: inline-block;
    background: #f5f5f5;
    padding: 3px 8px;
    margin-right: 5px;
    border-radius: 3px;
    font-size: 14px;
    color: var(--gray-color);
}

.tags a:hover {
    background: var(--primary-color);
    color: var(--white-color);
}

/* 评论区域样式 */
.comments-section {
    background: var(--white-color);
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.comments-section h2 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #ddd;
}

.comment {
    display: flex;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.comment:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.comment-author {
    flex: 0 0 100px;
    text-align: center;
}

.comment-author img {
    border-radius: 50%;
    margin-bottom: 5px;
}

.comment-content {
    flex: 1;
    padding-left: 20px;
}

.comment-meta {
    font-size: 12px;
    color: var(--gray-color);
    margin-top: 5px;
}

.comment-form {
    margin-top: 30px;
}

.comment-form h3 {
    margin-bottom: 15px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 关于我页面样式 */
.about-container {
    margin: 30px auto;
}

.about-section {
    background: var(--white-color);
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.about-section h2 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #ddd;
}

.about-content {
    display: flex;
    gap: 30px;
}

.about-img {
    flex: 0 0 300px;
    border-radius: 5px;
    object-fit: cover;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 24px;
    margin-bottom: 5px;
}

.title {
    font-size: 16px;
    color: var(--gray-color);
    margin-bottom: 15px;
}

.skills {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    margin: 15px 0;
}

.skills li {
    background: #f5f5f5;
    padding: 5px 10px;
    margin: 0 10px 10px 0;
    border-radius: 3px;
    font-size: 14px;
}

.contact-section {
    background: var(--white-color);
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.contact-section h2 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #ddd;
}

.contact-methods {
    display: flex;
    gap: 30px;
}

.contact-info {
    flex: 1;
}

.contact-info ul {
    list-style: none;
}

.contact-info li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.contact-info i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.contact-form {
    flex: 1;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .main-content,
    .about-content,
    .contact-methods {
        flex-direction: column;
    }

    .about-img {
        margin-bottom: 20px;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
    }

    .logo {
        margin-bottom: 15px;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
    }
}
